Angel fish, also known as Pterophyllum scalare, are a popular species of freshwater fish that are widely kept by aquarium enthusiasts. These graceful fish have a distinctive triangular shape and a shimmering, iridescent scale pattern that resembles the wings of an angel. There are also several synonyms for the name "angel fish" including silver scalare, scalare cichlid, freshwater angelfish, and common angelfish. These names are used interchangeably depending on the region or the preference of the aquarist. Regardless of the name used, these majestic fish are sure to add a touch of elegance and tranquility to any aquarium.